The elements of dynamic electricity and magnetism (1903)
Atkinson, Philip. [from old catalog] · New York, D. Van Nostrand company · leaf 148
e of about 36 inches, and the lamp is placed inthe box at the right which excludes the direct rays.The light is transmitted through a tube terminating ina small circular opening, from which a beam falls on ELECTRIC MEASUREMENT. 31 the small mirror shown just below the centre of thescale, and is… … Fig. 50. zero of the scale, when no current is passing, and movedto the right or left, according to the direction of thecurrent, to a distance corresponding to the currentstrength. The shadow of a fine wire, stretched in front 132 DYNAMIC ELMCTRiCITY AMD MAGNETISM. of the galvanometer mirror,…
Electricity · Magnetism
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